برداشت انرژی از ارتعاش القایی گردابه‌ای برای سیستم استوانه افقی دایره‌ای با لقی

ﺗﻘﺎﺿﺎی اﻧﺮژی ﺟﻬﺎﻧﯽ ﺳﺎﻻﻧﻪ 1.8 % ﺑﯿﻦ ﺳﺎلﻫﺎی 2000ﺗﺎ 2030اﻓﺰاﯾﺶ ﺧﻮاﻫﺪ ﯾﺎﻓﺖ. اﻧﺘﺸﺎر ﮔﺎز دیاﮐﺴﯿﺪﮐﺮﺑﻦ ﺑﻪﻃﻮر ﻣﺘﻮﺳﻂ ﺗﺎ 2.1 درﺻﺪ در ﺳﺎل اﻓﺰاﯾﺶ ﻣﯽﯾﺎﺑﺪ. ﮐﻤﺒﻮد اﻧﺮژی و آﻟﻮدﮔﯽ ﻫﻮا دو ﻣﻌﻀﻞ ﺑﺰرگ ﺑﺸﺮﯾﺖ ﻫﺴﺘﻨﺪ؛ اﺳﺘﻔﺎده از ﻣﻨﺎﺑﻊ اﻧﺮژی ﺗﺠﺪﯾﺪﭘﺬﯾﺮ ﺑﺎ ﮐﻤﺘﺮﯾﻦ آﻟﻮدﮔﯽ ﻣﺤﯿﻂزﯾﺴﺖ از اﻫﻤﯿﺖ ﺑﺴﺰاﯾﯽ ﺑﺮﺧﻮردار اﺳﺖ. ﺗﻮﺟﻪ ﺑﻪ ﮐﻢ ﺑﻮدن اﺛﺮ آﻟﻮدﮔﯽ ﺑﺮداﺷﺖ اﻧﺮژی از ﺑﺎد اﮐﺜﺮ ﻣﺤﻘﻘﺎن را ﺑﻪ ﺳﻤﺖ ﺗﺤﻘﯿﻖ در ﻣﻮرد اﯾﻦ ﻧﻮع اﻧﺮژی ﺳﻮق داده اﺳﺖ. اﻧﺮژی ﺑﺎد ﯾﮑﯽ از ﻣﻨﺎﺑﻊ اﻧﺮژی ﺗﺠﺪﯾﺪﭘﺬﯾﺮ اﺳﺖ و ﻧﺴﻞ ﺟﺪﯾﺪ ﺗﻮرﺑﯿﻦﻫﺎی ﺑﺎدی ﺑﺪون ﭘﺮه ﺑﺮ ﻣﺒﻨﺎی ﺳﺎزه اﻧﻌﻄﺎف ﭘﺬﯾﺮ اﺳﺖ. ﻫﺪف اﺻﻠﯽ در اﯾﻦ ﻣﻘﺎﻟﻪ اراﯾﻪ ﯾﮏ ﻣﺪل دﯾﻨﺎﻣﯿﮑﯽ ﺑﺮای ﺑﺪﺳﺖ آوردن ﺑﯿﺸﯿﻨﻪ اﻧﺮژی درﯾﺎﻓﺘﯽ از ﺑﺎد اﺳﺖ. ﺟﻬﺖ ﻧﺸﺎن دادن ﺑﺮداﺷﺖ ﺑﻬﯿﻨﻪ، اﺑﺘﺪا از ﻃﺮﯾﻖ ﺑﻬﯿﻨﻪﯾﺎ ﺑﯽ، اﺑﻌﺎد ﺑﻬﯿﻨﻪ ﻣﺪل دﯾﻨﺎﻣﯿﮑﯽ اﺳﺘﺨﺮاج و ﺑﻪ روش ﺗﺤﻠﯿﻠﯽ ﻣﺤﺎﺳﺒﺎت اﻧﺠﺎم ﺷﺪ. ﻣﺪل ﺟﺪﯾﺪ، ﯾﮏ ﺳﯿﺴﺘﻢ ارﺗﻌﺎش ﻏﯿﺮ ﺧﻄﯽ ﺑﺎ ﻋﺎﻣﻞ ﻟﻘﯽ در ﺳﺎﻣﺎﻧﻪ ﻓﻨﺮ، دﻣﭙﺮ و اﺳﺘﻮاﻧﻪ اﻓﻘﯽ اﺳﺖ. ﺑﺮای ﺗﺤﻠﯿﻞ ﺳﯿﺎﻻﺗﯽ ﺳﯿﺴﺘﻢ ﺑﻪ ﮐﻤﮏ دﯾﻨﺎﻣﯿﮏ ﺳﯿﺎﻻت، ﻧﯿﺮوی ﺑﺮآ وارد ﺑﺮ اﺳﺘﻮاﻧﻪ در ﻋﺪد رﯾﻨﻮﻟﺪز 25500در ﻣﺤﺪوده ﺗﺸﮑﯿﻞ ﮔﺮداﺑﻪای ﻻﯾﻪ ﺑﺮﺷﯽ ﮐﺎﻣﻼ آﺷﻔﺘﻪ ﺑﺪﺳﺖ اﻣﺪه اﺳﺖ. ﻧﺘﺎﯾﺞ ﺑﻬﯿﻨﻪﺳﺎزی ﺳﯿﺴﺘﻢ ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ در ﻧﻈﺮ ﮔﺮﻓﺘﻦ ﻣﻘﺎدﯾﺮ ﺑﻬﯿﻨﻪ در ﺷﺮاﯾﻂ ﻋﻤﻠﯿﺎﺗﯽ ﻗﻔﻞ ﺷﺪه و ﭘﺎﯾﺪار ﻣﻨﺠﺮ ﺑﻪ اﻓﺰاﯾﺶ ﺳﺮﻋﺖ ﺳﯿﻠﻨﺪر ارﺗﻌﺎﺷﯽ در ﻧﺘﯿﺠﻪ اﻓﺰاﯾﺶ 3.5 ﺑﺮاﺑﺮی در ﺑﺮداﺷﺖ اﻧﺮژی از ﺳﯿﺴﺘﻢ ﺳﯿﻠﻨﺪر ﺟﺪﯾﺪ ﺑﺎ ﻟﻘﯽ در ﻣﻘﺎﯾﺴﻪ ﺑﺎ ﺳﯿﺴﺘﻢ ﺑﺪون ﻟﻘﯽ ﻣﯽﺷﻮد ﮐﻪ ﺑﺎ روش اﻟﻤﺎن ﻣﺤﺪود اﻋﺘﺒﺎر ﺳﻨﺠﯽ ﺷﺪه و ﺑﺮای ﻣﺸﺨﺺ ﺷﺪن اﻓﺰاﯾﺶ ﺑﺮداﺷﺖ اﻧﺮژی ﺑﺎ ﺣﺎﻟﺖ ﺧﻄﯽ ﻫﻤﺎن ﻣﺪل ﻣﻘﺎﯾﺴﻪ ﮔﺮدﯾﺪه اﺳﺖ.

energy harvesting from vortex induced vibration for circular horizontal cylinder system with gap

abstract global energy demand will increase by 1.8% annually between 2000 and 2030. carbon dioxide gas increases by 1.2% per year on average. lack of energy and air pollution are two big problems of humanity. the use of renewable energy sources with the least environmental pollution is very important, and attention to the low pollution effect of harvesting energy from the wind has led most researchers to research this type of energy. have given. wind energy is one of the renewable energy sources and the new generation of bladeless wind turbines is based on flexible structure. the main goal of this article is to present a dynamic model to obtain the maximum energy received from the wind. in order to show the optimal impression, first through optimization, the optimal dimensions of the dynamic model will be extracted, and the calculations will be done by the analytical method. the new model is a non linear vibration system with a gap factor in the spring, damper and horizontal cylinder system. for fluid analysis of the system with the help of fluid dynamics, the force acting on the cylinder is obtained at reynolds re=25500, which is in the range of vortex formation of a completely disturbed shear layer. the system optimization results show that considering the optimal values in locked and stable operating conditions leads to an increase in the speed of the vibrating cylinder as a result of a 3.5 times increase in energy harvesting from the new cylinder system with a gap compared to the system without a gap, which it has been measured by the finite element method, and compared with the linear mode of the same model to determine the increase in energy harvesting.